You want to sort my_array, declared below. Which choice is the correct call to std::sort, using a lambda expression as the comparison function?

std::array<uint32_t, 50> my_array;

• A
  std::sort(my_array.begin(), my_array.end(),
  [](uint32_t a, uint32_t b) {
  return a < b;
  })
• B
  lambda(uint32_t a, uint32_t b){
  return a < b;
  }
  std::sort(my_array.begin(), my_array.end(), lambda);
• C
  std::sort(my_array.begin(), my_array.end(),
  lambda(uint32_t a, uint32_t b){
  return a < b;
  })
• D
  lambda(uint32_t a, uint32_t b){
  return a < b;
  }
  std::sort(my_array.begin(), my_array.end(), &lambda);